oracle 连接字符串

<connectionStrings>
    <add name="chrsym" connectionString="Data Source=192.168.1.10;UID=user;PWD=888888;DATABASE="data" providerName="System.Data.SqlClient"/>
    <add name="oracle" connectionString="User ID=cs;Password=cs;Data Source=(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST=192.168.1.10)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=cs)))" providerName="System.Data.OracleClient"/>
  </connectionStrings>

.net 中引用  System.Data.OracleClient;

 

using System.Data;
using System.Data.OracleClient;
using System.Configuration;
using System.Collections;


namespace Entity
{
    /// <summary>
    /// 操作Oracle数据库
    /// </summary>

    public class OracleHelper
    {
        public OracleConnection conn = new OracleConnection();//连接对象
        protected OracleCommand cmd = new OracleCommand();  //命令对象
        // Read the connection strings from the configuration file
        //public readonly string ConnectionStringLocalTransaction = ConfigurationManager.ConnectionStrings["OraConnString1"].ConnectionString;
        //public readonly string ConnectionStringInventoryDistributedTransaction = ConfigurationManager.ConnectionStrings["OraConnString2"].ConnectionString;
        //public readonly string ConnectionStringOrderDistributedTransaction = ConfigurationManager.ConnectionStrings["OraConnString3"].ConnectionString;
        //public readonly string ConnectionStringProfile = ConfigurationManager.ConnectionStrings["OraProfileConnString"].ConnectionString;
        //public readonly string ConnectionStringMembership = ConfigurationManager.ConnectionStrings["OraMembershipConnString"].ConnectionString;

        //Create a hashtable for the parameter cached
        private Hashtable parmCache = Hashtable.Synchronized(new Hashtable());
        protected readonly string ConnectStr = ConfigurationManager.ConnectionStrings["oracle"].ToString();
        

        public OracleHelper()
        {
           
        }

        public bool OpenDB()
        {
            try
            {
                conn.ConnectionString = ConnectStr;
                cmd.Connection = conn;
                conn.Open();
                return true;
            }
            catch
            {
                return false;
            }
        }

        public bool CloseDB()
        {
            try
            {
                if (conn.State == ConnectionState.Open)
                {
                    conn.Close();
                    conn.Dispose();
                    cmd.Dispose();
                }
                return true;
            }
            catch
            {
                return false;
            }
        }
        
        /**/
        /**/
        /**/
        /// <summary>
        /// Execute a database query which does not include a select
        /// </summary>
        /// <param name="cmdType">Command type either stored procedure or SQL</param>
        /// <param name="cmdText">Acutall SQL Command</param>
        /// <param name="commandParameters">Parameters to bind to the command</param>
        /// <returns></returns>
        public int ExecuteNonQuery(CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
        {
            try
            {
                PrepareCommand(null, cmdType, cmdText, commandParameters);
                int val = cmd.ExecuteNonQuery();
                cmd.Parameters.Clear();
                return val;
            }
            finally
            {
                CloseDB();
            }
        }


        /**/
        /**/
        /**/
        /// <summary>
        /// Execute a select query that will return a result set
        /// </summary>
        /// <param name="connString">Connection string</param>
        //// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">the stored procedure name or PL/SQL command</param>
        /// <param name="commandParameters">an array of OracleParamters used to execute the command</param>
        /// <returns></returns>
        public OracleDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
        {
            try
            {
                //Prepare the command to execute
                PrepareCommand(null, cmdType, cmdText, commandParameters);
                OracleDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
                cmd.Parameters.Clear();
                return rdr;
            }
            catch
            {
                conn.Close();
                throw;
            }
            finally
            {

            }
        }

        /**/
        /**/
        /**/
        /// <summary>
        /// Execute an OracleCommand that returns the first column of the first record against the database specified in the connection string 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  Object obj = ExecuteScalar(CommandType.StoredProcedure, "PublishOrders", new OracleParameter(":prodid", 24));
        /// </remarks>
        /// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">the stored procedure name or PL/SQL command</param>
        /// <param name="commandParameters">an array of OracleParamters used to execute the command</param>
        /// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>
        public object ExecuteScalar(CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
        {
            try
            {
                PrepareCommand(null, cmdType, cmdText, commandParameters);
                object val = cmd.ExecuteScalar();
                cmd.Parameters.Clear();
                return val;
            }
            finally
            {
                CloseDB();
            }
        }

        /// <summary>
        /// 执行一条返回结果集的SqlCommand命令，通过已有的连接字符串。
        /// 使用参数数组提供参数
        /// </summary>
        /// <remarks>
        /// 使用示例： 
        /// DateSet ds = ExecuteDataSet(CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="cmdType">SqlCommand命令类型 (存储过程， T-SQL语句， 等等。)</param>
        /// <param name="cmdText">存储过程的名字或者 T-SQL 语句</param>
        /// <param name="commandParameters">以数组形式提供SqlCommand命令中用到的参数列表</param>
        /// <returns>返回一个包含结果的DataSet</returns>
        public DataSet ExecuteDataSet(CommandType cmdType, string cmdText, params OracleParameter[] commandParameters)
        {
            try
            {
                PrepareCommand(null, cmdType, cmdText, commandParameters);
                OracleDataAdapter adapter = new OracleDataAdapter(cmd);
                DataSet ds = new DataSet();
                adapter.Fill(ds);
                return ds;
            }
            finally
            {
                cmd.Parameters.Clear();
                CloseDB();
            }
        }

        /**/
        /**/
        /**/
        /// <summary>
        /// Add a set of parameters to the cached
        /// </summary>
        /// <param name="cacheKey">Key value to look up the parameters</param>
        /// <param name="commandParameters">Actual parameters to cached</param>
        public void CacheParameters(string cacheKey, params OracleParameter[] commandParameters)
        {
            parmCache[cacheKey] = commandParameters;
        }

        /**/
        /**/
        /**/
        /// <summary>
        /// Fetch parameters from the cache
        /// </summary>
        /// <param name="cacheKey">Key to look up the parameters</param>
        /// <returns></returns>
        public OracleParameter[] GetCachedParameters(string cacheKey)
        {
            OracleParameter[] cachedParms = (OracleParameter[])parmCache[cacheKey];

            if (cachedParms == null)
                return null;

            // If the parameters are in the cache
            OracleParameter[] clonedParms = new OracleParameter[cachedParms.Length];

            // return a copy of the parameters
            for (int i = 0, j = cachedParms.Length; i < j; i++)
                clonedParms[i] = (OracleParameter)((ICloneable)cachedParms[i]).Clone();

            return clonedParms;
        }

        /**/
        /**/
        /**/
        /// <summary>
        /// Internal function to prepare a command for execution by the database
        /// </summary>
        /// <param name="cmd">Existing command object</param>
        /// <param name="conn">Database connection object</param>
        /// <param name="trans">Optional transaction object</param>
        /// <param name="cmdType">Command type, e.g. stored procedure</param>
        /// <param name="cmdText">Command test</param>
        /// <param name="commandParameters">Parameters for the command</param>
        private void PrepareCommand(OracleTransaction trans, CommandType cmdType, string cmdText, OracleParameter[] commandParameters)
        {

            OpenDB();
            cmd.CommandText = cmdText;
            cmd.CommandType = cmdType;

            //Bind it to the transaction if it exists
            if (trans != null)
                cmd.Transaction = trans;

            // Bind the parameters passed in
            if (commandParameters != null)
            {
                foreach (OracleParameter parm in commandParameters)
                    cmd.Parameters.Add(parm);
            }
        }

        /**/
        /**/
        /**/
        /// <summary>
        /// Converter to use boolean data type with Oracle
        /// </summary>
        /// <param name="value">Value to convert</param>
        /// <returns></returns>
        public string OraBit(bool value)
        {
            if (value)
                return "Y";
            else
                return "N";
        }

        /**/
        /**/
        /**/
        /// <summary>
        /// Converter to use boolean data type with Oracle
        /// </summary>
        /// <param name="value">Value to convert</param>
        /// <returns></returns>
        public bool OraBool(string value)
        {
            if (value.Equals("Y"))
                return true;
            else
                return false;
        }
    }
}